Every link is read a moment ahead of the pointer. Where it is heading counts, so the link it is going for answers before it arrives.
Closeness is measured to a link’s edge, not its centre, so a long link answers as readily as a short one.
Neighbours share the pointer. A clear lead takes nearly all of it; halfway between, they split it, and nothing switches off as something else switches on.
Every answer eases in and eases out, a little slower to leave than to arrive, so an unsteady hand never makes it flicker.